provides a mechanism for optimizing compilers to select the different Register configuration.

test/cctest/compiler/test-gap-resolver.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/gap-resolver.h"
 
 #include "src/base/utils/random-number-generator.h"
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;
@@ skipping 91 matching lines @@
   }
 
   friend std::ostream& operator<<(std::ostream& os,
                                   const InterpreterState& is) {
     for (OperandMap::const_iterator it = is.values_.begin();
          it != is.values_.end(); ++it) {
       if (it != is.values_.begin()) os << " ";
       InstructionOperand source = FromKey(it->first);
       InstructionOperand destination = FromKey(it->second);
       MoveOperands mo(source, destination);
-      PrintableMoveOperands pmo = {RegisterConfiguration::ArchDefault(), &mo};
+      PrintableMoveOperands pmo = {
+          RegisterConfiguration::ArchDefault(RegisterConfiguration::TURBOFAN),
+          &mo};
       os << pmo;
     }
     return os;
   }
 
   OperandMap values_;
 };
 
 
 // An abstract interpreter for moves, swaps and parallel moves.
@@ skipping 101 matching lines @@
       mi1.AssembleParallelMove(pm);
 
       MoveInterpreter mi2(pmc.main_zone());
       GapResolver resolver(&mi2);
       resolver.Resolve(pm);
 
       CHECK(mi1.state() == mi2.state());
     }
   }
 }